Crystalline Structure of "Perfect" Grain Boundary
- Practical Electron Microscopy and Database -
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Figure 4745 shows a STEM Z-contrast image of an 8° [0 0 1] tilt grain boundary in SrTiO3 in the [0 0 1] orientation, indicating two adjacent grains with cubic symmetry and five dislocation cores (dark ovals) at the grain boundary. Figure 4745 (b) shows one of the dislocation cores at a higher magnification. The brighter columns surrounding the core represent the Sr columns, while the less bright columns represent the Ti–O columns. Due to the small scattering amplitude of oxygen, the pure O columns are not visible.

Z-contrast image of a 8° [0 0 1] tilt grain boundary in SrTiO3

Figure 4745. (a) Z-contrast image of a 8° [0 0 1] tilt grain boundary in SrTiO3, and (b) One of the dislocation cores at a higher magnification. [1]

[1] R.F. Klie, I. Arslan, N.D. Browning, Atomic resolution electron energy-loss spectroscopy, Journal of Electron Spectroscopy and Related Phenomena 143 (2005) 105–115.

 

 

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